Whats a good spark plug?

[jre97]

Whats a good spark plug brand and part number for an 88 daytona that I plan to be running about 20 psi with alky soon? I know to stay away from platinums, splitfires are a waste of money, etc... I just need to know how much colder of a plug if any to run and what any one has had the best luck with.

[turbovanman²]

Lots of ideas, tried them all.
Some swear by the Champions, same number as stock but 9 instead of 12, colder. I have used them, its a plug.
I have used Autolites, also heat matched to the 9 Champion, lasted longer and again, it works.
For a copper plug, the Bosch is the best, its got a larger center electrode and lasts longer, again, matching to the 9 Champion.
I switched to the NGK BR9ES plugs-recessed tip and couldn't be happier, they reduce detonation and there a wicked plug. I went with the Iridium version as I have a high output coil and reg plugs don't last very long. I love these Iridiums, aprox 3000 Km's and no wear. The other plugs were lasting roughly 5000 km's.

[5sp. mini]

champion rn12y or high boost rn9y. alway worked for me.AL

[jre97]

I think it has rn9y's in it now. Car likes to cut out when it's cold unless you let it set and get good and up to operating temps which takes a while since it has a 160 thermostat in it.

[turbovanman²]

I think it has rn9y's in it now. Car likes to cut out when it's cold unless you let it set and get good and up to operating temps which takes a while since it has a 160 thermostat in it.

If its cutting out, its not your plugs.

BTW, take out the 160 thermostat, its running way to rich, your going to waste fuel and make less power not to mention wash down your walls and kill your rings.

[GLHSKEN]

If its cutting out, its not your plugs.

BTW, take out the 160 thermostat, its running way to rich, your going to waste fuel and make less power not to mention wash down your walls and kill your rings.

+1^^^ Also... look at Rn3's... Same heat range as Rn9YC's without the extended tip... no need for it (more tip to heat soak and cause detonation). I run RN9YC's or RN3's in all my cars..

[jre97]

Let me correct my self its cutting out about 4000 rpm just before I shift in normal driving when the car is cold. Wouldn't it be black smoking or smell really rich to be bad enough to wash down a cylinder?

[GLHSKEN]

Let me correct my self its cutting out about 4000 rpm just before I shift in normal driving when the car is cold. Wouldn't it be black smoking or smell really rich to be bad enough to wash down a cylinder?

Yes it should... you should check the timing belt. If you are cutting out above 4k rpm.. might have skipped a tooth..

[jre97]

Runs fine after it warms up. I just always attributed it to being "cold natured" or in need of a tune up.

[5sp. mini]

1+ on timing mine startes to pull at 3500.Al

[turbovanman²]

Let me correct my self its cutting out about 4000 rpm just before I shift in normal driving when the car is cold. Wouldn't it be black smoking or smell really rich to be bad enough to wash down a cylinder?

It won't plume black smoke as its not running THAT rich but the computer will never go into closed loop so fuel economy will be the shits. Studies have proven that for a street car, 195 will give the best engine wear but 180 is the coldest you should ever run. The wear increases expenashilly!! the colder it runs, so basically, it will wear out say 1000 times faster. Oh, your oil will get dirty very fast.

[jre97]

I'll look into putting a 180 in it this weekend. That might explain why I can never get any better than 22mpg out of it and I could use the heater working a little better. I'm pretty sure the 160 was put in to help keep temps down when tonyz2897 had the car and was running 28psi.

[jre97]

I was wrong it has ngk's with the recessed electrode.

[R/T]

I have the same set of NGK BR9ES's in my daily driver TII for a year or so.

THEY ROCK!!!

A BR9ES is probably colder than nessary, a BR7ES or BR6ES is about the same as a Champion 9.

With NGK: 9 = coldest 3 = hottest.

Throttle response and torque seemed to pick up with the NGK's....

[Tony Hanna]

I was wrong it has ngk's with the recessed electrode.

Yeah, I put the recessed NGK's in it along with the 160 stat in an attempt to take every precaution against detonation when I was running a bunch of boost in hot weather. With you running close to stock boost, a 180 or 195 thermostat should be fine. Based on the 5000 km lifespan Simon mentioned for the non-Iridium plugs, I'd say it's due a new set.

[turbo xtc]

i used champs 9 and i have found out that my engine pinged a little more at higher boost so i changed to champ 11's and it went away but i only boost about 12-14 psi

[turbovanman²]

i used champs 9 and i have found out that my engine pinged a little more at higher boost so i changed to champ 11's and it went away but i only boost about 12-14 psi

That doesn't make sense, 11 is a hotter, plug???

[WVRampage]

I use the NGKs cant remember the part number.

[phantom rt]

The 180-195 Stat Do I Ask For It In Any Store Or Where Do I Get It Or Any Body Has Some Pics So I Can Recognice It...i Had A Stat In My Lebaron With 2 Little Holes In It Of How Much Temp Is That...AND OTHER DOUBT

ABOUT THE PLUGS HOW MUCH GAP DO I MUST SET THEM I USE 16 SOME TIMES 18 PSIS

[GLHSKEN]

The temp is based on the t-stat spring pressure. Gap your plugs down to 28-30.